1421057479 has 4 divisors (see below), whose sum is σ = 1421268984. Its totient is φ = 1420845976.

The previous prime is 1421057467. The next prime is 1421057501. The reversal of 1421057479 is 9747501241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9747501241 = 919 ⋅10606639.

It is a cyclic number.

It is not a de Polignac number, because 1421057479 - 2¹¹ = 1421055431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421057419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95332 + ... + 109225.

It is an arithmetic number, because the mean of its divisors is an integer number (355317246).

Almost surely, 2^1421057479 is an apocalyptic number.

1421057479 is a deficient number, since it is larger than the sum of its proper divisors (211505).

1421057479 is an equidigital number, since it uses as much as digits as its factorization.

1421057479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211504.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 1421057479 is about 37696.9160409708. The cubic root of 1421057479 is about 1124.2698087003.

The spelling of 1421057479 in words is "one billion, four hundred twenty-one million, fifty-seven thousand, four hundred seventy-nine".